Coaster holder



FIG. 1 is a perspective view of a coaster holder in accordance with our new design, and showing a coaster in dotted outline that forms no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The dotted line disclosure of elements in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a coaster holder, as shown and described. 